What you need to know
- Wall detectors have limits and can give false positives or false negatives.
- Cables and pipes often follow predictable routes, but never rely on assumptions alone.
- If the consequence of a mistake is serious, stop and get professional help.
Use your own measurements
BricoDato tools help turn the guide into quantities, kWh, cost or a project plan.
Before making a hole
Look at sockets, switches, radiators, taps and service points. Think about the likely path of electrical cables and water pipes before using a detector.
What can confuse a detector
Metal studs, foil-backed insulation, damp materials, reinforcement and uneven surfaces can affect readings. Learn the tool on a known area first.
Use repeated passes
Scan horizontally and vertically and approach the target from several directions. Mark the edges of repeated detections rather than trusting a single beep.
Electricity and plumbing need caution
Isolate circuits where appropriate and never assume a wall is safe because one scan found nothing. Near bathrooms, kitchens and service routes, be especially cautious.
Final check
Before buying material or doing the work, review the assumptions and technical limits that matter for your specific product, room or installation.
- Inspect likely cable and pipe routes.
- Test the detector on a known target.
- Scan in more than one direction.
- Stop if readings are inconsistent or the risk is high.
Keep a small job sheet
Record the measurements, product reference, technical values you used, date and final result. For maintenance or diagnostics, also note the conditions at the time. A short written record makes future comparisons much more reliable.
Turn the guide into a decision
Use your measurements and the manufacturer’s technical data. If the decision affects fixed electrical work, structure, hidden leaks, refrigerant systems or another safety-critical installation, consult a qualified professional.